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Description of Campus Utilities

• Electricity• Water and Sewer• Natural Gas• Fuel Oil #6• Fuel Oil #2• Stormwater

Management

• Electricity• Water and Sewer• Chilled Water• Steam and Heating

Hot Water

Purchased Utilities Distributed Utilities

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• Moving towards Centralized Distribution

• 5 Steam and Chiller Plants

• Cates• Yarbrough• West Chiller• Centennial• CBC

• 3 Electrical Substations

• Sullivan• Centennial• CBC

Description of Campus Utilities

What is centralized distribution?

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District energy systems produce steam, hot water or chilled water at a central plant. The steam or water is then piped underground to individual buildings for or space heating, domestic hot water heating and air conditioning. As a result, individual buildings served by a district energy system don't need their own boilers or furnaces, chillers or air conditioners. The district energy system does that work for them, providing valuable benefits including:• Improved energy efficiency • Enhanced environmental protection• Fuel flexibility • Ease of operation and maintenance • Reliability • Comfort and convenience for customers • Decreased life-cycle costs • Decreased building capital costs • Improved architectural design flexibility

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What is district energy?

http://www.youtube.com/watch?v=H3ef6dz8BGg

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Campus Utilities: Chilled Water

Electricity (sometimes steam) and Water

A chiller cycle, similar to that of a

refrigerator or home AC unit, produces

cold water

42˚ F water is pumped to campus

buildings

CHILLER

Chilled Water

Purchased Utility Distributed Utility

• 5 Central Plants Serving 3 Campuses• Currently 17,800 tons of cooling installed• Build out capacity of 32,600 tons• 4+ miles of distribution piping – 4” to 48”• 21 stand alone systems (not connected to Central Plants)

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Campus Utilities: Steam/Condensate

Gas/Fuel Oil and Water

Steam at 150 PSI and 360˚F is distributed to

campus buildings

Steam and Domestic Hot Water

Fuel is combusted in a boiler to heat water and produce steam

BOILER

Purchased Utility Distributed Utility

• 4 Central Plants serving 3 Campuses• 1 mile of Utility Tunnels• 3+ miles of underground distribution pipes• Natural Gas, #2 Oil, and #6 Oil Fuels• 64 Steam & Condensate Meters

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Campus Utilities: Electricity

Electricity

Electricity is distributed

throughout main campus at 12,470 or

22,860 Volts

SUBSTATION

Electricity from the utility comes in at

120,ooo or 230,000 Volts

Electricity

Purchased Utility Distributed Utility

• 3 Major Substations served by Progress Energy• 23 looped circuits• 170 Circuit Switches• 200 Building Transformers• 202 Meters

•117 locations served direct by Progress Energy

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2.2 trillion BTUs

10$32,367,840

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The total amount spent on NC State utilities in FY 2010 was $32.2 million.

Electricity accounted for 65.9% ($21.2 million) of the total utility costs and provided for 52.3% of the total energy usage.

Natural gas accounted for 22.2% ($7.1 million) of the total utility costs and provided for 43.4% of the total energy usage.

6.9% ($2.2 million) of the total spent was on water supply. The water purchased was used for hygiene, HVAC, irrigation and in research laboratories

2.2 trillion BTUs$32,367,840

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